import java.util.Objects;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:DELL
 * Date:2024-11-21
 * Time:21:37
 */
class Person{
    public String id;

    public Person(String id) {
        this.id = id;
    }
//方法的重写
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Person person = (Person) o;
        return Objects.equals(id, person.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }
}
public class HashBack2<K,V> {
    static class Node<K,V>{
        public K key;
        public V val;
        public Node<K,V> next;
        //构造方法
        public Node(K key, V val) {
            this.key = key;
            this.val = val;
        }
    }
    public Node<K,V>[] array;
    public int usedSize;
    public HashBack2(){//初始化
        array=(Node<K, V>[]) new Node[10];
    }
    public void put(K key,V val){
        int hash=key.hashCode();
        int index=hash%array.length;
        Node<K,V> cur=array[index];
        //遍历数组
        while (cur!=null){
            if(cur.key.equals(key)){//字符串要用equals
                cur.val=val;
                return;
            }
            cur=cur.next;
        }
        //没有找到key
        Node<K,V> node=new Node<>(key,val);//插入的数实例化
        //头插
        node.next=array[index];
        array[index]=node;
        usedSize++;
    }
    public V get(K key){
        int hash=key.hashCode();
        int index=hash%array.length;
        Node<K,V> cur=array[index];
        while (cur!=null){
            if(cur.key.equals(key)){
                return cur.val;
            }
            cur=cur.next;
        }
        return null;
    }
}
